Gold Key © October 1974, Hanna-Barbera Scooby-Doo...Mystery Comics #28.  The story is "The Ancient Astronaut". 

With works by: Pencils: Dan Spiegle    Inks: Dan Spiegle

This book appears in (vf 79) with the expected nics, tics, wear and tear. Thanks for looking.     0523-xxxx-79